Efficacy of inositol supplementation in the prevention and treatment of gestational diabetes mellitus: A meta-analysis

Table 1 The results of quality assessment included meta-analyses based on A Measurement Tool to Assess Systematic Reviews 2 questionnaire

Ref.	Q1	Q2	Q3	Q4	Q5	Q6	Q7	Q8	Q9	Q10	Q11	Q12	Q13	Q14	Q15	Q16	Overall
Chan et al[21]	√	×	√	√	√	√	√	√	×	√	√	√	×	×	×	×	Moderate
Li and Shi[22]	√	×	√	√	√	√	√	×	×	√	√	√	√	√	×	×	High
Greff et al[10]	√	×	√	×	√	√	√	√	×	√	√	√	√	×	×	×	High
Guo et al[23]	√	×	√	×	√	×	×	×	×	√	×	×	×	×	×	×	Low
Li and Fang[24]	√	×	√	×	×	×	×	×	×	√	×	×	×	×	×	×	Low
Factor and Corpuz[25]	√	×	√	√	√	√	√	×	√	√	√	√	√	×	√	×	High
Liu and Liu[26]	√	×	×	×	√	√	×	√	×	√	√	√	√	×	×	×	Moderate
Mashayekh-Amiri et al[27]	√	×	√	×	√	√	×	√	√	√	√	√	√	√	×	×	High
Vitagliano et al[28]	√	×	×	×	√	√	×	√	√	√	√	×	×	×	×	×	Moderate
Wei et al[12]	√	×	√	×	×	×	×	√	×	√	√	√	×	√	×	×	Low
Zhang et al[29]	√	×	×	×	×	×	×	√	×	√	√	×	×	×	×	×	Low
Zheng et al[30]	×	×	√	×	√	√	√	√	×	√	√	×	×	√	×	×	Moderate

Q1: Did the research questions and inclusion criteria for the review include the components of Patient, Intervention, Comparison, Outcome; Q2: Did the report of the review contain an explicit statement that the review methods were established prior to the conduct of the review, and did the report justify any significant deviations from the protocol; Q3: Did the review authors explain their selection of the study designs for inclusion in the review; Q4: Did the review authors use a comprehensive literature search strategy; Q5: Did the review authors perform study selection in duplicate; Q6: Did the review authors perform data extraction in duplicate; Q7: Did the review authors provide a list of excluded studies and justify the exclusions; Q8: Did the review authors describe the included studies in adequate detail; Q9: Did the review authors use a satisfactory technique for assessing the risk of bias (RoB) in individual studies that were included in the review; Q10: Did the review authors report on the sources of funding for the studies included in the review; Q11: If meta-analysis was performed, did the review authors use appropriate methods for the statistical combination of results; Q12: If a meta-analysis was performed, did the review authors assess the potential impact of RoB in individual studies on the results of the meta-analysis or other evidence synthesis; Q13: Did the review authors account for RoB in individual studies when interpreting/discussing the review results; Q14: Did the review authors provide a satisfactory explanation for and discussion of any heterogeneity observed in the review results; Q15: If they performed quantitative synthesis, did the review authors conduct an adequate investigation of publication bias (small-study bias) and discuss its likely impact on the review results; Q16: Did the review authors report any potential sources of conflict of interest, including any funding they received for conducting the review. Q: Question.